Annual report pursuant to Section 13 and 15(d)

Stockholder's Equity (Details)

v3.6.0.2
Stockholder's Equity (Details) - USD ($)
 12 Months Ended
Jan. 27, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Feb. 18, 2016
Class of Stock [Line Items]          
Preferred stock, authorized (in shares)   10,000,000      
Preferred stock, par value (in dollars per share)   $ 0.001      
Net offering proceeds $ 54,200,000        
Repurchase of common stock   $ 2,041,851      
Shares of common stock offered (in shares)   11,886,216 11,939,697    
Aggregate offering price of shelf registration         $ 600,000,000
Reinvestment of dividends paid to common stockholders   $ 815,889 $ 817,915 $ 140,108  
CORRPrA [Member]          
Class of Stock [Line Items]          
Preferred stock, par value (in dollars per share)   $ 22.50      
Series A Cumulative Redeemable Preferred Stock [Member]          
Class of Stock [Line Items]          
Preferred stock, authorized (in shares)   10,000,000 10,000,000    
Preferred stock, par value (in dollars per share)   $ 0.001 $ 0.001    
Preferred stock, issued (in shares) 22,500 22,500 22,500    
Preferred stock, liquidation preference (in dollars per share)   $ 2,500 $ 2,500    
Depositary Shares [Member]          
Class of Stock [Line Items]          
Percent equivalent of preferred shares   1.00%      
Annual dividend, per share (in dollars per share) $ 1.84375        
Preferred Stock [Member] | Series A Cumulative Redeemable Preferred Stock [Member]          
Class of Stock [Line Items]          
Coupon rate percentage 7.375% 7.375%      
Common Stock [Member]          
Class of Stock [Line Items]          
Shares sold in offering (in shares)     2,587,500 4,485,000  
Authorized amount of shares to be repurchased     $ 10,000,000    
Repurchase of common stock (in shares)   90,613      
Repurchase of common stock   $ 91      
Reinvestment of distributions to stockholders (in shares)   34,581 28,510 3,973  
Reinvestment of dividends paid to common stockholders   $ 35 $ 29 $ 4  
Warrants [Member]          
Class of Stock [Line Items]          
Shares sold in offering (in shares)   945,594      
Right to purchase one share of common stock (in dollars per share)   $ 11.41      
Underwritten Public Offering [Member] | Depositary Shares [Member]          
Class of Stock [Line Items]          
Shares sold in offering (in shares) 2,250,000        
Preferred stock, liquidation preference (in dollars per share) $ 25.00        
Dividend Reinvestment Plan [Member]          
Class of Stock [Line Items]          
Reinvestment of distributions to stockholders (in shares)   34,581      
Reinvestment of dividends paid to common stockholders   $ 816,000      
Shelf registration after dividend reinvestment plan reduction   $ 599,200,000